#
Below is an equation that is not correct yet. By adding a number of plus signs and minus signs between the digits on the left side (without changes the order of the digits), the equation can be made correct.

123456789 = 100

The Question: How many different ways are there to make the equation correct?

2
i have 10 possible combinations. a systematic approach gives that many. If i can answer for question in the answer box, i will. Have an answer deleted.

123 - 45 - 67 + 89 =100

123 + 45 -67 + 8 - 9 = 100

1 + 2 - 3 + 4 + 5 + 6 + 78 + 9 = 100

there are more

Log in to add a comment